Apparatus for generating steam.



A. A. E. STBRZING. APPARATUS FOR GENERATING STEAM.

APPLICATLON TKLED JAN.31, 330g. RENEWED JUNE 25,1912 129,914.

Patented Mar. 2, 1915.

A. A. E. STERZING.

APPARATUS FOR GENERATING STEAM,

V APPLICATION FILED JAN.31, 1905. 1,129,914.

RENEWED JUNE 2E ,1912,

Patented Mar. 2, 1915.

7 SHEETS SHBET I.

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A. A. B. STERZING.

APPARATUS FOR GENERATING srEAM.

APPLICATION TILED JAN.31,1905. RENEWKD JUNE 26.1912. 1,129,914.

Patent-ed Mar. 2, 1915.

7 SHEETS 'SHEET 3 til/ 1 g0 11 l st 11 UH'oruu Jb "f;

W w: E E Y; El vi Z 6, vi $1 AM A DA AH T A. A. B. STERZING. APPARATUS FOR GENERATING STEAM. APPLICATION FILED JAN. 31, 1905. RENEWED JUNE 25, 1912.

1,129,914, Patented Mar. 2, 1915.

7 SHEETS-SHEET 4 9% I no one A. A. E. STBRZING. APPARATUS FOE GENERATING STEAM. APPLICATION HLB'D JAN. 31, 1905. RENEWED JUNE M m 1W P V m 4 f n y) l .1 1 M w M w w m w m M Wm. m m k A 1 A. A. E. STERZING. APPARATUS FOR GENERATING STEAM. APPLICATION FILED JAN,31,1905 REMWBD JUNE 251912.

1,129,914. Patented Mar. 2, 1915.

7 SHEBTS-SHEET 6.

' 535 tHTom wl M Patented Mar. 2, 19151 7 SHEETSSHEET 7.

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A. A. B. STERZING.

APPARATUS FOR GENERATING STEAM.

APPLIOATION FILED 1111.31, 1905. RENEWED JUNE 25, 1912.

WWW mama 15 Ml/en eration of steam,

2o delivered at a substantially uniform.

3o :conSiderable quantity 35 unnecessary and undesirable.

6 the right of the center of Fig. 1',

UNITED STATES. PATENT OFFICE,

ALBERT A. E. STERZING, OF NEW YORK, N. Y.

APPARATUS FOR GENERATING STEAM.

Specification of Letters latent.

Patented Mar. 2, 1 915.

Application filed January 31, 1905. Serial No. 243.565. Renewed June 25. 1912. Serial No. 705,8?6.

5 of New York, have invented certain new and useful Improvements in Apparatus for Generating Steam, of which the/following is a specification.

My present invention relates to the genand more particularly to the generation ofsupcrheated steam, certain features of the apparatus employed having been set forth and. claimed Iin my prior applications No. 104,449, filed April 24th, 1902,

. and No. 224,324, renewed September 13th,

An object of my invention is toprovide methods of and apparatus for. generating superheated steam whereby the steam may be pressure and temperature; also to'provide for the automatic regulation of the apparatus so that the quantity of steam generated is varied in approximate conformity with the variations of demand; also to provide for the automatic regulation of the apparatus whereby the same is rendered safe and reliable irrespective of sudden variations of demand, and whereby the employment of a of potentially active reserve energy, either in of highly heated liquid maintained "under pressure or in the form of a mass of highly heated metal or other substance, is -rendered These and other objects of my invention will more fully appearfrom the following description.

My inventionconsists in the novel methods;""features of construction, combinations,

and improvements herein shown and described.

The, accompanying drawings, which are referred to herein and form a part thereof, illustrate one embodiment of each of the several features of my invention, the same serving in connection with the description herein to explain the principles of the inven- .tion.

Of the drawings Figure 1 is a front elevation/Of an apparatus constructed in accordance with my invention; Fig. 2 is a side elevation of the same, as seen from the left in Fig. 1; Fig. 3 is a vertical longitudinal section of the same taken on a line soi ewhat to ig. 4 is a vertical sectional vie on an enlarged scal the form of a mass in a direction opposite to illustrating certain details of one feature of the apparatus; Figs. 5 and 6 are views, partly in section and partly in side elevation, illustrating the details of certain features of the apparatus; Fig. 7 is a vertical sectional new, partly in elevation, illustrating details of a certain feature of the apparatus; Fig. 8 is a similar view of the same, the section being taken at right angles to that of "generator may be employed. In accordance with certain features of the invention, however, the generator is constructed and arranged with relation to the furnace so that the water supplied thereto is gradually heated to the temperature of vaporization and is thereafter gradually vaporized and the steam superheated and delivered in the superheated condition, the generator having a single continuous passage so arranged that the flow of the fluid therethrough takes place products of combustion from the furnace flow through the generator. The generator illustrated in the drawings is substantially the same as that illustrated in my prior application, Serial No. 10l,449 above referred to. Briefly described, this generator conthat in' which the sists of a series of generator elements ll, 7,

8, and 9, each consisting of 3 flat metal plates so secured at their edges and at, suitable intermediate points as to form, a shallow chamber having considerable length and width as compared with its depth, said chamber being divided throughout the greater part of its length into upper and lower portions forming two parts 0 a continuous passage, the lower passage of each element being connected near one'e'nd to the corresponding end of the adjoining element so that a single con tinuous passage is formed from one end of the generator to the other.

The connections between the several elements are preferably in the form of flanged joints 10, 11, 12, and 13, preferably arranged at both nae of the'generator and made sucthe upper passage of I cessively longer, those at the end of the generator farthest from the furnace being the shortest and those at the end nearest the furnace being the longest as indicated in the i iiithe volume of the products of combustion resulting from the gradual cooling thereof.

7, 8, and 9 nearest the furnace,

The two elements 5 and 6 farthest from the furnace are preferably made of greater "depth than the other elements, so that a considerable quantity of water is maintained in the generator at a temperature below the temperature of vaporization, the water being gradually vaporized and the steam generated therefrom superheated by the elements the passages in said elements being so small as to prop- ;erly. retard the flow of the fluid toward the hotter portion of the generator and prevent the same "from being suddenly projected upon the metal which-is at such a temperature as would cause the Water to enter the spheroidal state. The superheated steam is preferably delivered from the lower element into a steam drum 14- and from there to the steam delivery pipe 15.

To aid in the proper starting of the generator. the delivery end of the lowermost element 9 is connected by a pipe 16 to the uppermost element, a float valve 17 being provided in the upper element 5 to control the flow of fluid through said pipe. To assist in starting the generator. also. a water gage 18 is placed in communication at'its lower end with the element 6 and at its upper end with the element The function of these parts is to enable the generator to be filled up to the proper point before starting the furnace, and then .ifter the furnace is started to permit the water in the lower part of the generator to be forced by the pressure of the steam generated thereinto the upper part of the generator. the float 17 serving to prevent the flow of steam from the delivery end of the generator to the supplv end when the latter is filled with water. The pressure gage 19 is connected with the steam drum l4 and a thermostat 20 may be provided. if

desired, for indicating the temperature of the steam in the drum.

21 indicates a pipe through which water is supplied to the upper element of the gencrater.

So far as some of the features of. my in ntion are concerned. an! suitabl fo m of furnace may he provided to whi h the fuel war be fed in any desired manner. in ac c r lance i h one feature of the inv ntion. a fu nace of the character set forth in my zipplication Serial 51o. 224,321-

above referred to, is employed and auto matic means are provided for supplying fuel to the same, said means being preferably,

also, of the same character as the automatic fuel-supplying means illustrated in the same application. .\s shown, the furnace in cludes a substantially horizontal grate 25,

wall is y'irovided, the same consisting of a wall 26 of refractory material mounted on a carriage 27 supported at opposite sides of the furnace by guide rails 28 and preferably kept at-a proper temperature by a water cooling system including a water chambef 29 and pipe connections 80, 31 which may form part of the feed water system. Any suitable means may be the wall 26 so as to vary the effective area of the grate surface of the furnace. shown, a rack bar 32 is connected with the provided for moving carriage 27 andiarranged to. mesh with a pinion fixed on a transverse shaft 33, said shaft being extended through the side wall of the furnace and provided with a worm and wormwheel connected with a longitudinal shaft 34 which is preferably driven and automatically controlled in ently to be described.

The means for feeding fuel to the furnace illustrated in the drawings consists of a fuel hopper 36 communicating at its lower end the manner pres with a series of horizontal chambers arranged trans erselv of the furnace near the upper forward end of the same. In e'ach of the chambers is arranged a reciprocating piston or plunger 37, which when retracted is adapted to he suddenly driven inwardly bv spring 38 so as to project a small quantitv of fuel into the combustion chamber, the distance to which the fuel is projected being dependent upon the tension of the spring 38.

lFor the purpose of retracting the series of plungers 37 against the tension of their springs and then suddenly releasing said plungers. a horizontal shaft 39 is journaled in suitable framework below the series of plungcrs. said shaft being provided with a series of cam fingers 40; each adapted to 39 by m n of a vertical shaft 43 having a how-l gm; re-m'mction with the engine at its lov' r end and vnorm and wormwheel connection at its upfiw" end with the shaft 39. For tin-1 puny/$546 03 uni-{mg the tension of the swings 5% so as. to cant-:12 the fuel to be qhri ueis :o all parts of the fui nace, preferahl': to |.ic. aeirely greater distances from .15 farther and farther into the thefront to the rear thereof,"the springs are donkey engine will be reduced so as to re to =a ,rock shaft 45 having an arm- 46 duce the rate of supply of fuel to the fur- 1 which is'connected by link 47' to a cam 48 nace. I

on a transverse shaft 49 receiving a In accordance with one feature of my in-' slight rotary motion in proper time relavention, means are also provided whereby 7 tion with. the shaft 39, by any suitable the size of the furnace is automatically'vauneans, as a; ratchet wheel 50 engaged by ried to approximately conform to the varipawl151 mounted on an oscillating arm 52 ations in the quality of fuel supplied and operated by .a link 53 connected with pin 54 to theivariaticns of demand for steam. Any 7 rm eccent'rically mounted on the end of the suitable means may be provided for. this shaft 39.- 7 urpose. In accordance with the partial-( It will be seen that as thecam 48 is rol ar' construction illustrated the shaft 34. is tated, the tension of the springs 38 will be, provided with a pair of oppositely arranged gradually increased so as to prog'ect the fuel bevel wheels, preferably friction wheels, 70

urnace and and 71, said wheels being splined on the 80, then suddenly decrease so as to start again shaft and arranged to alternately move into at the beginning of the furnace and repeat and out of cooperative-relation with a' corthe operation. 11 order that the maximum responding 'pair of bevel wheels 72 and 73' distance to which the fuel is projected in fixed on the shaft of the donkey engine.

the furnace may be varied in accordance For the purpose of throwing one or the wlt he os t on o themo able back wal other of the bevel wheels f; ,and 71 into 26, the e pct of the cam 48 on thesprings operation in accordance with fiaria-tions in 38; 1s .var1ed,,-preferably in an automatic the pressure of the steam in the generator -manner,' by suitable connections with the piston 74 is provided, the sameigbeing mount 2s mechanism by which the back wall is moved. ed in a cylinder 75, which mayi be connected 0 shown, a shaft 49 is mounted'in "eccenin any suitable way to a source of pressure tric bearings which are rocked back and which varies with the variations of demand forth to-vary the height of the shaftf49 b for steam or with the variations in the arms 56 aiiixed on a transverse rock sha rate at which the fuel' is supplied to the i so 57 having-an arm 58 adjust-ably connected generator. As shown, the cyinder 75- is toga'bar .59 having suitable gear connection connected by a pipe 76 with the ipe 42 by withthe shaft 33, as clearly illustrated in which steam is supplied to th'e'dbnkey en- 7 Fig. 2. glue, and preferably at a point in said pipe .--Any suitable means may be provided for between the point at which the governor a5 aut0ma tically varying the supply of fuel to is connected and the engine, so that the "-the" furnace to approximately meet the. vamovement of the pistonvwill vary with the riations cf the demand for steam. Preferpressure in the en 'ne .andconsequently I ably means for varying the supply of with the speed of t e engine, the piston 74 i {fuel arerendered-operative by'some condibeing moved in OPPOSltIOII tO the pressure lotion ,of the fluid in the generator which vaby a spring 77. Any suitable connections .rie's "w th the variations of demand .for .may be provided between the piston 74 and steam. Preferably, and asshown, the vathe friction wheels 70 and 71. As shown, ria'tions of thepcondition as to pressure of the opposite ends of the piston rod are con-' Zthe fluidin the generator are employed for nected to a pair of vertical levers 78 and 46 fthis purpose 79, the same being arranged to engage- In.ajeeordance with the construction illusgrooves in the hubs of the. friction wheels tratedra piston chamber 60 .havinga'spring 70 and 71, respectively. It follows from or wei' "ht-controlled-piston .therein is conthis construction that when the speed of nectedata-point below the piston by a pipe the engine is increased, the wheel 70 Wlll 60 6l with the steam supply pipe 42 so as 'to be be thrown into operation and the shaft 34 fat all=tim snbjected'to-thepressure of the will be rotated in the direction required to "steam in the generator. The piston 60 is, move the wall 26 so as to increase the size "fas shown,' ?eonnectedwith a weightedlever63 of the furnace, and when the speed of the I pivotally. mounted onthefront wall 1 adjaengine is reduced the friction wheel 70 will 65 cent to-the piston chamber 60 and having a be thrown out of operation and the wheel 12o flink connection with a lever 64 suitably 71 thrown into operation so as to decrease pivotedfadjaoent to the lever 63, as shown in the size of the furnace. In order thatthe Fig.j2, ,said' lev'er 64being connected by a automatic operation of these devices may rod'651'with acentrifugal governor 66 by he stopped, if desired, and hand control "60 which thc 'flow'of steam to the donkey ensubstituted, suitable means maybe provided gif gine etlriscontrolled; The weight of the for controlling the levers 78 and- 79 indeiaggvegn riswpreferably' counterbalanced by pen'dently of theplston 74. "shown, each and the parts are so arof said levers is' prov1ded;w1th; a threaded 'rangedthatupon an increase-in the pressure link rod 80 havinga hand-operated. stop a? ste m the-supply to; the member:8lftbem-wbnltamybeso=cperated 18v 20 wheel .will be 45 means ior vn'ry-ing the supp I us to force the desired one of the ivheels 70 or 71 into operative position, the other wheel 70 being simultamiously"thrown vout either limit of its stroke, any Suitable means- -may be provided. shown, a pair of cum 1 levers-83=und 84 areinountjed in'nuoh relation to the ends of "thelevers Y78 and 79 than skid levers may' -be moved so' an to throw the correnponding wheels out of op- 'erative position. As shown, the earn levers f :88, 81 are-connected by suitable links with the rock shaft/57, whiehas' above described,

7 isopernted by the bit 59, having positive gear connection withthe shaft 33. The connectjons are. s'ueh 'that when the back wall 26 reaehes the reer'limit of its stroke, the Irown out of operation; und when flwf well reaches the forward wheel-=71 will -"l fioiujiu maiof-fliefeatures .of my in- W I am any suitable means forenjpplying water to 'In. accor ancewith certain ifeeturesof the invention, however the for implying water to the generator no erreuderedfoperetiveor controlled so as to afltomtioally yni'y the Suppl y of water with-the \M'im -.tions df "for-steam in such manner tlmtfithtsthxdwillha delivered int a substantlinlly uniform pressure and temperature; I i

In accordancewibh. the preferred emhodiment of invention, the supply of water is varied'l'ilii'gotlywith the variations in the quantit mf -ftielflsupplied to the ge.'.erntor and w flfthe:vurietions in thmsize of the furnace The supply of water is; preferably, also, withlthe variations of the eondition' ofl'thefluid in theenemtor, the iies in accord anoe withfthe best construction being renderetl operuitivel tower the supply in versely with flie 'vgriatiqns of pressure in the gen? eratoi' enddirect ly; with the variations in the temperature of theeteamjdeli vered from ',the generator. H i i In accordance with one feature of the inventione, it plurality ,of means vfor .su pplying water'jto the generator areyirovided and '55 preferably the supply from one'of said devices is varied' with variations of one (mndition of the fluidiin thegenerator, and the supply frorn 'another supply'devim is varied with variations of another condition of the In sirxordanc e with the particular-embed m nt of the invention illustrated, tWOBlIfiHH neing connected to the supp] ea thep'ump 87 being eonneoted later element 5 b .may bi: driven .rom any suitnhle source.

a pipe 89. The pumps As shown,- the' pump 86 is connected with the stei m delivery pipe 15 by -a pi ;e 90. For the purpose of controlling the e active delivery of this pump-noes to vary the supply off water therefrom in accordance with the varizitions in the offth'e furnace, a

- throttle valve 91in thenteam'pipefifl is conneeted by means of. a 'link-fiflnnd lever 93 with. ther'od 59. The supply of :pvqter from-j thisv pump is also vagied nith the vuriutioma in the temperature of theieteam delivered from the generator of a; lever 94, i

which is coxmected, .et'j, enieend to the rear end of "the lest fgenmtor. element 9, as indicateclin dottetl-fliusfini' 2, and at the other-.en'clb of. a link 95 withaesuite'blet rattle valve. in the steqm pipe 90 in weh'nmnner that as the temperature oftheelement 9,"'and don-Q sequent y of the steam delivered therefrom; rises, =the sup 1y of steamtofthepumpiie increa sed and -the supply of water cotte spondingly increased. epumplsi ispreferabl supplied with stam hy-u.-. pipe; whirl is mnnected with theet'oam pipe 42 at a point between the governor mntrolhxl valve and the engine so that thespeedvof the pump 87 will hevuried dir'mt'ly with the xpeed of the donkey engine, 5nd the quantity steam will be, entirely out off from the pump 87. 'lofthis end a throttle valve 91'. onthe pump 'isymnnected by the linlg OS-and rock aim ft 99 toth end of the le'verfli, the said lever 63, preferably,' heing provided with a slot. so that a sup )1 of steam to the pump is not effected unt'i the pressure in the gem erntorreaches 3 predetermined point; but when the yuiessure in the generator rises uhove that point, the supply of steam to the pump will. at first he reduced and then erstirely cut oil.

' With a generator and furnace of the character herein shown and deserilmd a sudden deei' -nze in or eersution of the demand for seteur'n would he apt to euse! material rim in preasure of the etea'fr in the generator for the reason that the efi'ertiw: heat of the fur I umocnnn'ot he suddenly re'luoml or entirely stopped.

'ln mmordu'mze with one feature of my invo ition, rrieiir'i'aerr-rmm'ided' for taking care of the steam-gene te l in we r-1F; .1: the demand at any time ..o to prevent an (ll/T10! mal" or dangerous mi in the pressure.- In

accordance with this feature of the invention, this is accomplished by condensing the steam, preferably in such a manner that the heat thereof may be returned to the apparatus and eifectively utilized. ance with the embodiment of this feature of the invention illustrated, asteam injecting device is employed, the details of which are illustrated in Fig. 7.- As here shown, the casing 100 is. provided, the samehaving a steam chamber 101 connected to the steam delivery pipe 15 by a pipe 102. Within the steam chamber is arranged a piston 103 pressed downwardly by a strongcompression spring 104: in such manner as to seat the valve 105 on a seat 106 provided therefor in the. lower part of the chamber 101. When the pressure in the generator rises beyond a predetermined point, the" valve 105 will be elevated from its seat. In axial alii ement with the valve 105 a suitably tapered 'injector passage 107 is provided, the same communicating at its upper end with a chamber 108 which is connected by the pipe 109 with the lower part of the upper generator element 5 and the lower end of said passage is connected by a pipe 110 with the same element. It follows from this Construction that when the demand for steam is suddenly reduced or cut off and the pressure rises in the generator, the valve 105 will be opened and the steam delivered into the water in the chamber 108 and an injector action set up, which will cause a circulation of water and a condensation of the steam, the water in the element 5 being at a temperature coiisiderably below the temperature of vaporization corresponding to the pressure in the generator.

In accordance with another feature of the invention, the supply of water to the generator is reduced by an amount corresponding to the quantity of steam which is generated in excess of the demand. This can be accomplished in any suitable way. In accordance with the particular embodiment of this feature of the invention illustrated, a diaphragm regulator 111. is connected at opposite sides of the diaphragm 112 witlrthe opposite sides of the injector passage 107 in such manner that the movement of the diaphragm will vary in -acconlancc with the quantity of fluid passing through the. injector. The diaphragm 112 is connected by means of suitable levers 113, I14 and links H5 and llfl with a throttle valve 117 in the delivery pipe 21 of the pump 80 H) as to vary the tlow of water through said pipe in substantial accordance with the variations of (low of fluid through the injector. The parts are prcfisrably so adjusted that the pump 87 will be stopped before the injector is brought into operation. it will be seen that the beat of the steam generated, by

In accordmeans of the injector, will be returned to th water in the generator.

It is to be distinctly understood that my invention in its broader aspects is not limited to the particular constructions herein shown and described, as many changes may be made therein without departing from the main principles of the invention and without sacrificing its chief advantages.

Having thus-described my invention, what I claim as new and desire to secure by Letters .Patent is:

means'and with said generator and acting under the influence of fluid therein and rendered operative with variations of one condition of the fluid in the generator for controlling supply of water to the generator, and mechanism operatively connected with another of said controlling-means and with the generator and acting under the influence of" fluid therein and rendered operative with variations of another condition of the fluid in the generator for controlling supply of water to the generator.

2. An apparatus for generating superheated steam including in combination, a generator having a passage constructed and arranged to-receive water at one end and to deliver superheatedsteam at the other end, a plurality of devices forsupplying water to the generator, controlling-means thcrefor,'

pressure operated mechanism operatively connecting with one of said controllingmeans and with said generator and acting under the, influence of fluid therein and rendered operative with variations of the pressure in the generator, for controlling supply of water to the generator, and mechanism operatively connected with another of said controlling-means and with the generator and acting under the influence of fluid therein and rendered operative with variations of the tcm mrature of the superheated steam delivered from the generator for controlling supply of water to the generator.

15. An apparatus for generating superhcnlcd steam including in combination, a furnace, a generator having a-passage constructed and arranged to receive water at one end and to deliver supcrheatcil steam at the other end, means for supplying fuel to the furnace, a plurality of devices for supplying water to the generator, controllingmeans for said supply-instrumentalities, mechanism operatively connected to thecontrolling-means-for one of said supply devices and acting under the influence of fluid in the generator and rendered operative with variations of one condition of the fluid 6 in the generator for controlling the fuelsupply and water supply, and mechanism opcratively connected with the controllingmcans for another of said watersupply devices and acting under the influence of fluid 10 in the generator and rendered operative with variations of another condition of the fluid in the generator for control ing supply of water to the generator. 4. An apparatus for generating steam ineluding in combination, a furnace, a generator, means for supplying fuel to the furnace, a plurality of devices for supplying water to the generator, controlling-devices therefor, means operative on certain of said eontrollingdevices and rendered operative with variations of one condition of the fluid in the generator for controlling the fuelsupply means and one of said water-suppl y devices, automaticmeans for varying the supply of fuel, and int-ans operative on other of said controlling devices and rendered operative' with variations of another condition of the fluid in the generator for controlling another of said water-supp! y devices. 39 ,An apparatus for generating steam ineluding in combination, a furnace, a generator, means for supplying fuel to the furnace, a plurality of devices for supplying water to the generator, control]ing-devices therefor, means operative on certain of said controlling-devices and rendered operative with variations of the pressure of the fluid in the generator foreontrolling the fuelsupply means andonQof said Water-supply wdevrces, and means operative on other of said controlling levie -and rendered operative with variatio'ns'of the temperature of the fluid in the generator for controlling another of said water-su ply devices. 6. An apparatus or generating superheated steam including in combination, a furnace, a generator having a single ooniinnous passage so arranged with relation to the furnace that the water is gradu lly heat- ,5 ed to the temperature of vaporirx'ation and is then gradually vaporized and superheated, a plurality of devices for supplying water to the generator, controlllngmlcviccs therefor, means operative on certain of said controlling devices and rendered operative hywariations of one condition of the fluid in the generator for controlling one of said supply devices, and means operative on other of said controlling devices and renao dered opcrative with variations of another condition of the fluid in the generator for controlling another of said supply devices.

7. An apparatus for generating superli.eated steam including in combination, a 5 furnace, a generator having a single continuous passage so arranged with relation to the furnace that the water is gradually heated to the temperature of *vaporization and is thereafter gradually vaporized and superheated, a plurality of devices for sup plying water to the generator, controllingdevices therefor, means operative on certain of said controlling devices and rendered operative by variations in the pressure of the fluid in the generator for varying the supply from one of said devices inversely with the variations of pressure, and means operativeon other of said control ling devices and rendered operative with variations of the temperature of the steam so delivered from the generator for varying the supplyfrom another of said devices directly with said variations of temperature.-.

8. An apparatus for generating superheated stcamincluding in cornhinaticn. a 85. furnace, means for supplying fuel to the furnace and automatic means for varying the supply of fuel, a generator having a single continuous passage arranged with relation to the furnace that the water gradually heated to the temperature of vaporization. and is then gradually vaporized andsuperheah 'l. a plurality of-i'levi s for supplving water to the generator, r.:ontrol ling. evires therefor, means operative n ccrtaii'r of said controlling-d0\iccs and rendered operative liy iariations of one condition of the fluid in the generator for core trolling one of said supply devices, and means operative on other of said controlling devices and rendered operative with varia-, tions of another condition of the fluid in' the generator for controlling another of said supply devices.

9. An apparatus for generating superheated steam including in combination, a furnare, a generator having a single continuous pasxage so arranged with relation to the furnace that the water is gradually heated to the ten'iperature of VHIPOI'iZHtlOH and is thereafter gradually vaporized and superh ated, means for supplying fuel to the combustion chaml'ier, a plurality of devices fonsupplying water to the generator, eontrollingaleviccs therefor, means operati e on certain of said control!lug-devices and rendered operative with variations of one condition of the fluid in the generator for controlling the fuel-supply means and also one of said water-supply devices, and means operative on other of said controlling devices andrendered operative with variations of ahother'eondit-ion of the fluid inthe generator for controlling another of said supply-dcviees.

10. An apparatus for generating superheatedsteam including in eon'ihination, a furnace, a generator vhaving a single continuous passage so arranged with relation to the furnace that the water is gradually erative on other of said controlling devices a and rendered operative with variations of the temperature of the steam delivered from the generator for varying the supply from another of said devices directly with said variations of temperature.

1.1. An apparatus-for generating superheated steam' including in combination, a furnace, a generator consisting of a single continuous passage constructed and arranged in cotiperative relation with the furnace togradually vaporize the water and superheat the steam, two pumps for supplying water to that portion of the generator farthest from the furnace, controllin -devices interposed between the pumps an the generator and means acting on one of said controlling-devices and adapted to be rendered operative by variations of one condition of the fluid inthe generator for controlling one'of said pumps, and means acting on other of said controlling devices and adapted to be rendered oper'ativewith variations of another condition of the fluid in the generator for controlling the other pump.

12. An apparatus for generating superheated steam including-in combination, a furnace, a' generator consisting of a single continuous passage constructed and ar' ranged in cooperative relation with the furnace to gradually vaporize the water and snperheat the steam, two pumps for supplying water to that portion of the generator farthest from the furnace, controllingdcviecs interposed between the pumps and the generator and means acting on one of said mmtrolling-devices and adapted to he rendered operative by variations of the pressure of the fluid in the generator for controlling one of saidpumps, and means acting on other of said controllingdcvices and adapted to be rendered operative with variations of the temperature-of the super' heated steam delivered from the generator for controlling the other pump.

13. An apparatus for generating superheated steam mcludm" in combination a furnace, a generator consisting of asingle continuous passage constructed ands-an ranged in cooperative relation with-the furnace to gradually vaporize the water and superheat the steam, means for supplying fuel to the andatic means fora-", varying the-,%upply of Jfuel, two pumps for. supplying Water to that. portionv of the generator farthest from the fufnace, controlling-devices interposed between the pumps and the generator and means acting on one of said controlling-devices and adapted to be rendered operative by variations of one condition of the fluid in the generator for controllingone of said pumps, and means 76 acting on other of said controlling-devices and adapted to be rendered operative with variations of another condition of the fluid in the generator for controlling the other pump. 80

14. An apparatus for generating superheated steam, including in combination, a furnace, a generator consisting of a single continuous passage constructed; and arranged in cooperative relation with. the fur-..85 v nace to gradually vaporize the waterrand. superheat the steam, means for sup'plyiiig fuel to the furnace and automatic means'for varying the supply of fuel, two pumps for supplying water to that portion of the generator farthest from the furnace,--controlsaid controlling-devices and adapted to be rendered operative with variations of the I temperature of the fluid in the generator for 7 controlling the other pump.

15. An apparatus for generating steam including in combination, a furnace, a generator', means for supplying water 'tothe generator, and automatic means for simultaneously varying the size of the furnace and the supply of water.

16. An apparatus for generating steam including in combination, a furnace, a genorator, means for supplying Water to the generator, controlhng-mechanism for said water-supply1ng means, and means connecting ,therewith and operating thereon and rendered operative by variations in the condition of the fluid in the generator for automatically varying both thc'size of said furnace and the supply of water.

1'7. An apparatus for generating steam including in combination, a furnace; agenerator, means for supplying fuel to the furnace, means for supplying \vaterto the gencrater, automatic means forvarying the size of the furnace, and automatic means for varying both the supply of fuel to the fuy: nace and the supply of water.

18. An apparatus for generating steam including in combination; a furnace, a gefiiorator. mm for supplying fuel to tine-fursaid controlling-means and rendered 0 retiv'e by variations in the condition o the fluid in the generator for varying the supply of fuel to the furnace. v

28. An apparatus for generating steam including in combination, a furnace, a genorator, means for supplying liquid to the generator, controlling-mechanism or said supplyingmeans, and means connecting therewith and adapted to be rendered operative by variations in the condition of the fiuid in the generator for varying the supplyof the liquid, and means also acting on said controlling mechanism and rendered operative by variations in the pressure of the fluid in the generator for automatically varying the size of saidu mace.

29. An apparatus for generating steam including in combination, tor, means for supplying liquid to the generator, controlling-mechanism for said supplying-means, and means connecting therea furnace, a genorawith and adapted to be rendered operiztive by variations in the condition of the'fluid in the generator for varying th' supply of, the liquid, means for supplying fuel to the furnace, controlling means. for said fuel-applying means, means connecting with sun controlling means and rendered operative by,

variations in the pressure of the fluid in the generator 'for varying the size of the furnuce, and means also connectin controlling means and rendere operative by variations in the pressure of the fluid 'in the generator for varying the supply of-fuel to the furnace. i

In testimony whereof, I have signed my name to this specification, of two subscribing witnesses.

ALBERT A. E. STERZII IG Viitnesses:

Wu; J. DOLAN, EDWIN Sncnn.

with said in the presence 

